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Finding the Fourth Proportional to 216,781.56, 325,206.09 and 128,098.98

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Solution

The fourth proportional to 216,781.56, 325,206.09 and 128,098.98 is: 192,168.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    216,781.56 : 325,206.09 = 128,098.98 : x
  2. Step 2: Convert to fraction form
    216,781.56/325,206.09 = 128,098.98/x
  3. Step 3: Cross multiply
    216,781.56x = 325,206.09 × 128,098.98
  4. Step 4: Simplify right side
    216,781.56x = 41,658,568,418.79
  5. Step 5: Solve for x
    x = 41,658,568,418.79/216,781.56
  6. Step 6: Final answer
    x = 192,168.41

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.